The norhis peters co



(No Model) M. M. CLARK.

GALVANIG BATTERY. N0.'5Z8,Z86. Patented Oct. 30, 1894.

THE nonms FEWRS 00., FHOTD-LITHO. wnsummon o c UNITED v STATES PATENT O FIC MARTIN M. CLARK, OF CHICAGQ, ILLINOIS, ASSIGNCR TO THE WESTER ELECTRIC COMPANY, OF SAME PLACE.

GALVAN lC BATTERY.

SPECIFICATION forming part of Letters Patent No. saeeseuatea October 30,1894.

Application filed May 27,1893. Serial No.475,76 3- (No model.) 4

To all whom zltmnty concern.-

Be it known that I, MARTIN M. CLARK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,have invented a certain new and useful Improvement in Galvanic Batteries, (Case 10,) of which the following is afull, clear, con cise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to the construction of galvanic batteries and more especiallyof that class of batteries in which the negative electrode is surrounded with a depolarizing substance in a solid form,as peroxide of manganese. Its object is to provide cheap, simple, and effective means for retaining the depolarizing substance in place around the negative electrode.

One of the forms constructed in accordance with my invention comprises a cylindrical bag or sack of some textile fabric, a circular plate of earthenware closing the lower end of the sack and secured thereto, two semicircular plates of earthenware closing the upper end of thesackand adapted to admit the negative electrode between them, and secured to the sack, and in connection with'the negative electrode, means for retaining the electrode in position in the sack. This combination, for convenience, I designate the negative element. In constructing this form, I prefer to secure theearthenware plates in their places in the sack by means of some waterproof cement, but they may be secured by bands bound round the sack, compressing the latter into grooves formed in the peripheries of the plates. The negative electrode, which may be a carbon plate of. the usual form, is retained in position in the sack by a pin projecting upon opposite sides of the plate, and resting against the under side of the earthenware plates which close the upper end of the sack.

My invention will be more readily understood by reference to the accompanying drawings which are illustrative thereof.

In Figure 1 of the drawings I have shown a complete cell, consisting of my improved form of negative element,a positive element, a fluid electrolyte surrounding both, and a suitable containing vessel. Fig. 2 is a longitudinal sectional .view of myimproved negative element, with the negative electrode shown in elevation. Fig. 3 shows other means of retaining the carbon plate in position. Fig. 4 is a plan of the plates forming the top of the sack. Fig. 5 is an elevation of a bag or sack similar to that shown in Figs. 1 and 2, showing a modified method of closing its ends. Fig. 6 is a longitudinal sectional view of the sack shown in Fig. 5 with the depolarizing mixture removed and the negative electrode shown in elevation.

Like parts in the several figures are designated by similar letters of reference.

Referring to Fig. 2, a is the carbon plate. b b are two semi-circular plates of earthenware. c is a circular plate of the same material. dis a sack of textile material, preferably canvasl e is the depolarizing mixture, usually peroxide of manganese, mixed with frag ments of carbon. The negative electrode a is provided with a suitable headf and a binding screw 9. Through the plate a just be low the earthenware plates b b, is thrust a wooden pin it, whereby the plate is secured from being removed from the sack.

In Fig. 4 are shown the forms of the plates b 17' having the recesses to receive the carbon plate a.

In Fig. 3 the carbon plate a is embraced by the plates b b, which enter into notches o 0 cut in the edges of the carbon plate a, thus retaining it in place.

In Fig. 1 the negative element 1; is shown in place in a glass jar 70, containing also a zinc rod Z and the electrolyte m.

In Figs. 5 and 6 I have shown the sack or bag which contains the depolarizing mixture with a cloth bottom and a cloth rim at the top. Beneath the cloth rim is placed a disk of any suitable substance, preferably pasteboard, through which the negative electrode a is passed. The negative electrode may be secured from being withdrawn in either of the ways shown in Figs. 2 and 3.

A plastic compound n is covered over the bottom and lower portion of the sack as shown, and also about the rim and the upper portion of the sack.

My invention is well adapted to use in dry batteries, in which case the positive elecembracing said electrode, a circular plate 0 trode, preferably zinc, is preferably made in below said electrode, a sack of textile matethe form of a cup adapted to contain the rial having its ends secured to said plates, 2 5 negative element and the electrolyte. and surrounding said electrode, a depolariz- 5 I do not confine .Inyself M to the use of. the ing substance d contained in the vessel thus material for closing the endsof the sack, I formed, apin through the electrode aadapted have used wood,carbon, and other substances; to prevent the electrode from being removed but when the negative element is to be used from the sack, substantially as and for the 30 in a dry battery, as described,it is preferable purpose specified.

10 to make the plate 0 of insulated material. 3. The combination with the negative elec- Having thus described my invention, I trode or having notches 0 0',of platesb b and claim as new and desire to secure by Letters c..of insulating. material, sack at having its Patentr a t a endssecured respectively to said plates, and 35 1. The combination, with a negative eleca solid depolarizer 0 contained in said sack, z 5 trode a, oftwo plates b b, embracing said eleosubstantially as and for the purpose specified. trode, a plates, a sack d of textile material In witness whereof Ihereunto subscribe my securedlto said plates andsurrounding said 1 name this 16th day of May, AD. 1893.

electrodetau d, asuitable solid depolarizing substances contained in saidsaclgsubstanit 7 MAR FIN K" 2o tiallyqas and for the purpose specified. Witnesses:

,2. The oombinatiomwith the negative elec- GEORGE L. URAGG,

trode a, of the two semicircular plates b, b, GEORGE MOMriHON. 

